VirtualBox won't start my until then working WIN10 vm

[ravencj]

Hello, I am scratching my head with the current problem;
I had a perfectly working VM with Windows 10 64bits, over the last weekend I installed Hyper-V to run some tests. After that when I tried to run VBox again I got a kernel error, which I fixed by reinstalling VBox again, but since my VMs are extremely slow to a point which they won't finish booting.

I uninstalled Hyper-V, and the problem persists. The only way I could get my Win10 vm to boot was to set it to use only 1 processor.

Has anyone experienced something similar?

Thanks in advance

[multiOS]

Have a look at viewtopic.php?f=25&t=99390 I suggest trying the advice in Section 4 and see if it helps.

AFAIK There is no way to uninstall Hyper-V once it has been installed, short of a clean install of Windows. You can only deactivate it.